E. M Landesman

Hilbert-space methods in elliptic partial differential equations

E. M Landesman, E. Landesman, 1967 .

NONLINEAR PERTURBATIONS OF LINEAR ELLIPTIC BOUNDARY VALUE PROBLEMS AT RESONANCE

A. Lazer, A. C. Lazer, E. M Landesman, 1969 .

Smooth solutions in Case 1 of the Heawood conjecture for non-orientable surfaces

E. M Landesman, J.W.T Youngs, 1972 .